30023206621 has 2 divisors, whose sum is σ = 30023206622. Its totient is φ = 30023206620.

The previous prime is 30023206613. The next prime is 30023206637. The reversal of 30023206621 is 12660232003.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21128076025 + 8895130596 = 145355^2 + 94314^2 .

It is a cyclic number.

It is not a de Polignac number, because 30023206621 - 2³ = 30023206613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30023206651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15011603310 + 15011603311.

It is an arithmetic number, because the mean of its divisors is an integer number (15011603311).

Almost surely, 2^30023206621 is an apocalyptic number.

It is an amenable number.

30023206621 is a deficient number, since it is larger than the sum of its proper divisors (1).

30023206621 is an equidigital number, since it uses as much as digits as its factorization.

30023206621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 30023206621 its reverse (12660232003), we get a palindrome (42683438624).

The spelling of 30023206621 in words is "thirty billion, twenty-three million, two hundred six thousand, six hundred twenty-one".